Aerospace Engineering > GATE 2022 > Complex Numbers
Let x be a real number and i = √-1. Then the real part of cos(ix) is
A
sinh x
B
cosh x
C
cos x
D
sin x

Correct : b

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Related Topics

real part of cos(ix) complex numbers hyperbolic cosine Aerospace Engineering GATE 2022 GATE AE 2022 Q13 mathematics complex analysis cos(ix) real part Euler's formula

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